EP 3611221 A4 20201007 - METHOD FOR PREPARING REGENERATED RUBBER BY MULTI-STAGE SCREW-BASED CONTINUOUS DESULFURIZATION
Title (en)
METHOD FOR PREPARING REGENERATED RUBBER BY MULTI-STAGE SCREW-BASED CONTINUOUS DESULFURIZATION
Title (de)
VERFAHREN ZUR HERSTELLUNG VON REGENERIERTEM KAUTSCHUK DURCH MEHRSTUFIGE KONTINUIERLICHE ENTSCHWEFELUNG AUF SCHRAUBBASIS
Title (fr)
PROCÉDÉ DE PRÉPARATION DE CAOUTCHOUC RÉGÉNÉRÉ PAR DÉSULFURATION CONTINUE À BASE D'UNE VIS MULTI-ÉTAGES
Publication
Application
Priority
- CN 201711102594 A 20171110
- CN 2017118796 W 20171227
Abstract (en)
[origin: US2019382552A1] The invention relates to a method of preparing reclaimed rubber, especially using multi-stage screw extruders, which belongs to the field of recycling and reusing of waste rubber. The rubber powder and softener which were preliminarily mixed are compacted and added into first counter rotating twin screw extruder through thermal insulation and metering apparatus, the softener permeates the waste rubber powder uniformly under the action of temperature in the extruder to finish primary desulfurization of rubber waste powder; add preliminary devulcanized material continuously into second multi screw extruder after cooling by transformation device, rapid desulfurization and regeneration can be achieved by means of activator and shear action; The desulfurized rubber powder is cooled and transported into the third multi-screw extruder in series, the performance of deprocessing can be improved by shear action under low temperature; After extrusion, the recycled rubber is obtained by molding device and cooling device. The whole process is completed under closed oxygen isolation condition, realizing safe, simple and continuous desulfurization regeneration. It is energy saving and environmental protection with excellent properties.
IPC 8 full level
B29B 17/00 (2006.01); C08J 11/10 (2006.01); C08L 17/00 (2006.01)
CPC (source: CN EP US)
B29B 7/48 (2013.01 - US); B29B 7/484 (2013.01 - EP); B29B 7/488 (2013.01 - EP); B29B 7/726 (2013.01 - EP); B29B 7/7461 (2013.01 - EP); B29B 7/7466 (2013.01 - US); B29B 7/7485 (2013.01 - EP); B29B 7/7495 (2013.01 - EP); B29B 7/823 (2013.01 - EP US); B29B 7/90 (2013.01 - US); B29B 17/0026 (2013.01 - EP); B29C 48/022 (2019.01 - EP); B29C 48/277 (2019.01 - EP); B29C 48/2888 (2019.01 - EP); B29C 48/385 (2019.01 - EP); B29C 48/40 (2019.01 - EP); C08J 11/10 (2013.01 - CN EP); C08J 11/12 (2013.01 - EP); C08J 11/28 (2013.01 - US); C08L 17/00 (2013.01 - CN US); B29B 7/88 (2013.01 - EP); B29K 2105/26 (2013.01 - US); C08J 2319/00 (2013.01 - CN EP US); C08L 2205/025 (2013.01 - CN EP); C08L 2205/03 (2013.01 - CN EP US); C08L 2205/035 (2013.01 - CN EP); Y02P 70/10 (2015.11 - EP); Y02W 30/62 (2015.05 - EP)
Citation (search report)
- [A] CN 102816343 A 20121212 - UNIV BEIJING CHEMICAL
- [A] CN 102911399 A 20130206 - UNIV BEIJING CHEMICAL
- [A] US 2016272778 A1 20160922 - YUAN QIANG(CHARLES) [CA]
- [A] WO 2006079128 A1 20060803 - EREMA [AT], et al
- [A] US 2010308495 A1 20101209 - PILLAI CHANDRASEKARAN R [US], et al
- [A] US 2012004331 A1 20120105 - ZHAO RONGBIN [CN], et al
- See references of WO 2019090938A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
US 11453758 B2 20220927; US 2019382552 A1 20191219; CN 107936331 A 20180420; CN 107936331 B 20201002; EP 3611221 A1 20200219; EP 3611221 A4 20201007; EP 3611221 B1 20211020; EP 3611221 B8 20211201; WO 2019090938 A1 20190516
DOCDB simple family (application)
US 201716476535 A 20171227; CN 201711102594 A 20171110; CN 2017118796 W 20171227; EP 17931711 A 20171227